Needle guide for records



Patented May 17, 1932 JOHN S. OLEARY, OF PHILADELPHIA, PENNSYLVANIANEEDLE GUIDE FOR .RECORDS Application led DecemberG, 1929. Serial No.412,185.

This invention relates to improvements in phonographic records, and hasas one of its objects to overcome one of the disadvantages attending thestarting of a phonograph,

namely, that the stylus of the reproducer is sometimes unintentionallyor accidentally dropped into the record groove of the disk at a pointmore or less in advance of the starting end of the groove, and thereforethe present invention contemplates the provision of a phonograph recordhaving means whereby the stylus will be automatically directed to thestarting end of the record'groove even though it should be carelesslylowered onto the record.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts to behereinafter fully described, illustrated in 2o the accompanyingdrawings, and speciiically pointed out in the appended claim.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure lis a plan view of a disk record embodying the invention.

Figure 2 is a detail sectional view, on an enlarged scale, on the line 22 of Figure 1 looking in the direction indicated by the arrows.

Figure 3 is a view showing how the guide grooves merge with one anotherand the sound groove.

The record disk is indicated by the numeral l and is provided upon oneor both of its faces with the usual record groove which is indicated bythe numeral 2.

In carrying out the invention, the face of the record in which therecord groove 2 is formed, is likewise formed with a plurality of stylusguiding grooves which are indicated in the drawings by the numeral 3,and these grooves are preferably of slightly greater depth than thegroove 2 and, from a point somewhat in advance of the starting point ofthe groove 2, the grooves 3 are so arranged that they converge, onarcuate lines, to the starting end of the groove 2V and mutually mergewith one another near their point of juncture with the said end of thegroove 2, so that when the stylus of the phonograph is lowered onto therecord so that it will seat in any one of the grooves 3, and the recordis rotated, the stylus will be guided accurately end thereof.

What I claim is z t ecord having, at the start- A phonographic r ing endof its sound record groove, a plurality of stylus guiding grooveslocated within the bounds of the record groove and in the samehorizontal pla ing grooves leading to the said starting end netherewith, said guideof the sound record groove on arcuate lineseccentric to the axi s of rotation of the said sound record groove, andhaving their inner ends merging with one another and with the saidstarting end of In testimony whe the sound record groove. reof I aiiiXmy signature. JOHN S. OLEARY.

